【单选题】

From: MyronApplebaum,EuroTravel

To: Sally Legazia, IMT International
Subject: Itinerary forEuropean Trip
Date: March 14, 9:45.25
A、m.
Dear Ms. Legazia:
Attached please find a copy of your itinerary. I was able to make all the reservations for your one-week trip inEngland, Germany, andAustria except for two. (1) The flights on your preferred carriers from London toBerlin were all full for Monday morning, March 27, both economy and business class. I can still get you on a low-cost carrier for that morning, or, if you prefer, I can get you on an afternoon flight at 1:45 from London toBerlin on SAS. Please let me know immediately. (2) Your requested hotel in Vienna does not have any suite vacancies for March 31-April 1. TheEdelweiss Hotel, a four-star hotel in the suburbs, does. I can get you a large double room in your preferred downtown hotel. I would advise the latter because transportation on your tight schedule from suburbs to city could be a problem.
As soon as I hear from you, I will make the changes suggested above or try any new ones you bring forwarD、When you are thoroughly satisfied, I will send you the bill for airlines and hotel reservations. Thanks for thinking of us atEuroTravel.
In the e-mail, what does the term "SAS" in paragraph 1, line 6, refer to
A、An airline carrier
B．
A、type of airline seating
C．The name of a country
D．The name of an airport